Songshan–Xindian line
Beimen station platform
Overview
Other name(s)	Green line
Locale	Taipei and New Taipei, Taiwan
Termini	Songshan Taipower Building, Xindian
Stations	20
Service
Type	Rapid transit
Services	Songshan–Xindian (full) Songshan–Taipower Building (short-turn) Qizhang–Xiaobitan (branch)
Operator(s)	Taipei Rapid Transit Corporation
Depot(s)	Xindian
Rolling stock	C371 (6-car) C381
History
Opened	24 December 1998 (1998-12-24) (Guting–CKS Memorial Hall) 11 November 1999 (1999-11-11) (Xindian–Guting) 31 August 2000 (2000-08-31) (CKS Memorial Hall–Ximen) 15 November 2014 (2014-11-15) (Ximen–Songshan)
Technical
Line length	21.5 km (13.4 mi)
Number of tracks	2
Character	Underground
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	750 V DC  third rail
Operating speed	80 km/h (50 mph)
Route map Legend TRA West Coast line to Nangang G19 Songshan G18 Nanjing Sanmin G17 Taipei Arena (   ) G16 Nanjing Fuxing G15 Songjiang Nanjing (   ) G14 Zhongshan (   ) Taipei Main Station Taoyuan Airport MRT G13 Beimen TRA West Coast line Taiwan High Speed Rail (  ) G12 Ximen (  ) G11 Xiaonanmen (  ) G10 Chiang Kai-shek Memorial Hall (  ) (  ) G09 Guting (  ) G08 Taipower Building G07 Gongguan Jingmei River G06 Wanlong G05 Jingmei Jingmei River Taipei New Taipei City (   ) G04 Dapinglin G03 Qizhang G03A Xiaobitan Xindian Depot (  Xiaobitan branch) G02 Xindian District Office G01 Xindian This diagram: view talk

The Songshan–Xindian or Green line (code G) is a metro line in Taipei operated by Taipei Metro, named after the districts it connects: Songshan and Xindian. Parts of the line runs under the Roosevelt Road, following the route of the former Xindian (Hsintien) railway line, which ceased service in 1965 on its southern section.

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• January 1991: Construction began on the Xindian line.
• 21 November 1997: The Songshan-Ximen section is approved by the Executive Yuan.
• 24 December 1998: The segment between Chiang Kai-shek Memorial Hall and Guting opened for service.
• 11 November 1999: The rest of the line opened for service, trains run through Tamsui Line to Tamsui.
• 31 August 2000: The segment between Chiang Kai-shek Memorial Hall and Ximen opened for service (as the Xiaonanmen Line).
• 29 September 2004: The Xiaobitan branch line opened for service.
• 19 August 2006: Construction begins on the Songshan-Ximen section. ^[1]
• December 2008: During underground excavation along Nanjing East Road, Section 3, underground support (anchors) for several nearby buildings were discovered. Structural concerns resulted in a temporary suspension of excavation and construction. ^{[2] [3]}
• 14 January 2009: The city government announced that the building anchors would not affect the opening of the Songshan-Ximen section. ^[4]
• 15 November 2014: With the opening of Songshan section, trains run between Songshan and Xindian stations, forming the current Songshan–Xindian line. Tamsui-Xindian services ended and the Xiaonanmen line merged with the current Songshan–Xindian line.

Initial plans for the line originally called for another station between Zhongshan and Beimen stations (at Chien-Cheng Circle). However, the Circle was suffering from economic concerns, as well as engineering feasibility and effectiveness problems. Coupled with problems with landowners regarding joint developments and two of the entrances/exits, plans for the station were shelved on 1 May 2007. ^[5] The station would have been a five-level underground station with stacked, split platforms. ^[6]

It was originally estimated that its opening would take place in 2013. ^[7]

Shield tunneling was used to construct most of the tunnels on the line, except for a few locations. ^[8] Tunneling beneath Dacheng St. crosses existing Taiwan Railway Administration and Taiwan High Speed Rail tunnels. ^[8] Common utility ducts were constructed in sync with the Metro line, carrying water pipes, gas pipes, and cables. ^[9] Over 200 homes were demolished or relocated to make way for Metro land use. ^[10]

Construction of the line was divided into three civil engineering section contracts and one electrical/mechanical system-wide contract. ^[11] The contract for construction on the eastern end of the line (including Nanjing Sanmin and Songshan) was awarded to Da Cin Construction Co., Ltd. on 2 March 2006. ^[12] The 3.02 km (1.88 mi)-long section includes a crossover section, a tail-track work shaft, and three shield tunnels. Construction of the line was completed in late 2014.

In 2008, steel price increases threatened to delay construction plans due to the price doubling over the previous two years. ^[13] The Ministry of Economic Affairs ordered that exports of other steel products be strictly supervised to ensure a steady local supply and to keep prices down.

Taipei Workshop, a 3rd level historical monument constructed during the era of Japanese rule, was exactly where the proposed Beimen station would be located. Thus, a temporary removal project commenced on 20 October 2006 to move the structure until construction of both the Songshan Line and the Taoyuan International Airport MRT are completed. ^{[14] [15]} The building moved 30 meters to the southeast, and moved back when construction is completed. ^[16]

As of December 2017, the typical off-peak service is:

• 11 trains per hour (tph) between Xindian and Songshan
• 3 tph between Taipower Building and Songshan

Chopin's Nocturne in E-flat major, Op. 9, No. 2 is played at metro platforms every time a train arrives on the Songshan–Xindian line. ^{[17] [18]}

• M - Main line
• B - Branch Line

Services			Code	Station Name		Travel time to previous station (s) [19]	Stop time at station (s) [19]	Date opened	Transfers	Districts	City
M		B		English	Chinese
●			G01	Xindian	新店	—	25	1999-11-11		Xindian	New Taipei
●			G02	Xindian District Office	新店區公所	111	25	1999-11-11
●		●	G03	Qizhang	七張	78	25	1999-11-11
		●	G03A	Xiaobitan	小碧潭	203	—	2004-09-29
●			G04	Dapinglin	大坪林	75 [a]	25	1999-11-11
●			G05	Jingmei	景美	89	25	1999-11-11		Wenshan	Taipei
●			G06	Wanlong	萬隆	87	25	1999-11-11
●			G07	Gongguan	公館	119	40	1999-11-11		Zhongzheng, Da'an
●	●		G08	Taipower Building	台電大樓	67	40	1999-11-11
●	●		G09	Guting	古亭	88	40	1998-12-24
●	●		G10	Chiang Kai-shek Memorial Hall	中正紀念堂	83	40	1998-12-24	(constructing)	Zhongzheng
●	●		G11	Xiaonanmen	小南門	75	40	2000-08-31
●	●		G12	Ximen	西門	81	40	2000-08-31		Wanhua, Zhongzheng
●	●		G13	Beimen	北門	75	30	2014-11-15		Datong
●	●		G14	Zhongshan	中山	114	35	2014-11-15		Zhongshan, Datong
●	●		G15	Songjiang Nanjing	松江南京	106	35	2014-11-15		Zhongshan
●	●		G16	Nanjing Fuxing	南京復興	92	35	2014-11-15		Songshan, Zhongshan
●	●		G17	Taipei Arena	臺北小巨蛋	84	30	2014-11-15		Songshan
●	●		G18	Nanjing Sanmin	南京三民	102	30	2014-11-15
●	●		G19	Songshan	松山	138	—	2014-11-15

• Xiaobitan branch line